CCC/201 ISBN 978-92-9029-521-1
June 2012
copyright © IEA Clean Coal Centre
Abstract
Low rank coals have gained increasing importance in recent years and the long-term future of
coal-derived energy supplies will have to include the greater use of low rank coal. However, the
relatively low economic value due to the high moisture content and low calorific value, and other
undesirable properties of lignite coals limited their use mainly to power generation at, or, close to, the
mining site. Another important issue regarding the use of lignite is its environmental impact. A range
of advanced combustion technologies has been developed to improve the efficiency of lignite-fired
power generation. With modern technologies it is now possible to produce electricity economically
from lignite while addressing environmental concerns. This report reviews the advanced technologies
used in modern lignite-fired power plants with a focus on pulverised lignite combustion technologies.
CFBC combustion processes are also reviewed in brief and they are compared with pulverised lignite
combustion technologies.
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